From: Ralf Baechle <ralf@linux-mips.org>
To: Yoann Allain <yallain@avilinks.com>
Cc: linux-mips@linux-mips.org
Subject: Re: sti() freezes the kernel
Date: Mon, 17 Oct 2005 16:14:36 +0100 [thread overview]
Message-ID: <20051017151436.GH4884@linux-mips.org> (raw)
In-Reply-To: <4353A98C.80508@avilinks.com>
On Mon, Oct 17, 2005 at 03:39:24PM +0200, Yoann Allain wrote:
> Since last mail I played with the interrupt masks (IM - bits 15-8 in
> MIPS status register) . From the MIPS cause register, it seems that the
> bit 15 (hardware interrupt 5 or timer interrupt) is the originator of
> the freezing interrupt. And the exception code shown for this interrupt
> is 6 corresponding to a Bus error exception. I think there's a pointer
> to the interrupt handler not correctly initialized. So that the
> interrupt makes a jump to nowhere.
In which case you should get a nice register dump with $ra pointing to
offending jalr instruction + 8 bytes. Of course that requieres you
to get printk working even earlier but with a serial console that's
trivial.
Ralf
prev parent reply other threads:[~2005-10-17 15:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-17 8:48 sti() freezes the kernel Yoann Allain
2005-10-17 13:10 ` Ralf Baechle
2005-10-17 13:39 ` Yoann Allain
2005-10-17 15:14 ` Ralf Baechle [this message]
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